<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 
class Authentication_model extends CI_Model{

    /* Gán tên bảng cần xử lý*/ 
    private $_name = 'ci_user'; 

    function __construct(){
        parent::__construct(); 
    }
    /**Get all users in DB 
    * @param null 
    * @return array
    */ 
    function a_fCheckUser( $a_UserInfo ){
        $a_User = $this->db->select() 
                    ->where('username', $a_UserInfo['username']) 
                    ->where('password', $a_UserInfo['password']) 
                    ->get($this->_name) ->row_array(); 
        if(count($a_User) >0){
            return $a_User; 
        } 
        else {
            return false; 
        }
    }
}
// - See more at: http://thuthuatvietnam.com/huong-dan-tao-form-login-tren-codeigniter.html#sthash.unszdIJ7.dpuf